Speedometer.



J. F. WLKIE.

SPEEDOMETER.

APPLIGA'MON FILED 06T. 23, 190s.

989,7452;m Patented Apr. 18, 1911.

2 SHEETS-SHEET 2.

l 3fm QM@ @No :new

UNTTED STATES PATENT OFFICE.

JOHN F. WILKIE, 0F HIBBING, MINNESOTA.`

SPEEPOMETER.

Specilcation of 'Letters Patent.

Patented Apr. 18, l:1.911.

Application led 0ctober23, i909. Serial No. 524,104.

To all whom 'it may concern: I

lie it. known that l, JOHN l?. lVlLnin, a citizen ot the United States, residing at Hib` hing, in the county of St. Louis and State of Minnesota, have invented certain new and useful Improvements in Specdometcrs, of which the following is a specification, referenceI being had to the accompanyiug;` drawings.

My invention relates to speed-indicating devices and particularly to sp :d-indicating devices for self-propelled vehicles, such as automobiles; and an objecty of 1uy'invention is to provide a device of the charactcr described which will be simple in construction, con'iparatively cheap in manufacture and first cost of installation and most efficient in use and which will. indicate to the authorities and to the. general public the speed at which 'the vehicle is nioving;- at. any

. time.

In the drawings illustrating the principle of my invention and the best modcnow known to me ot applying that principle, Figure l is a side elevation of an antoniobilc, partly in section, embodying' my invention; Fig. 2 is a. front View of the same; Fig". 3 is a detail of the connection with the vfront indicator; Fig. 4 is a detail of the connection between the power-transmitting or driving shaft and the speeddndicating mechanism; Fig'. 5 is a section on the line .ft- 1i of Fig. 4t; Fig. 6 is a detail section taken on the line B--B of Fig. 5; Fig. 7 is a detail of the governor mechanism; and Fig'. 8 is a detail of the diah The body a of the automobile is provided at its front end with the usual engine-casing in which are housed the engines c. The latter are protected from the mud and dust of' the roadway by the usual canvas-like shield or tarpaulin d. The engines c'drive the sha t't c upon which is mounted the usual flywheel and which is connected by the universal joint g to the transmission Shaft L that propels the vehicle through the gears (not shown) which connect the rear axle with the shaft it. The parts so far described are now and have long been in common use in automobile construction.

To thebottom of the chassis j of the auto-v mobile is fastened a casing in which is housed ballgovernor lml provided with a bevel-gear n which meshes with and is driven by the bevel-gear 0 upon the engine-shaft 0. The bevel gear n is fast upon the `upper end of the governoespiruillc p the lower end of which is mounted in a suitable bearing in the bottom of the casing and which carries a fast collar l] to which are, attached the upper toggle-links 1' that carry the balls s and are connected by the lower toggle-links f to a ring; H. The latter is slidably fitted in the groove n formed cireum ferentially in the loose collar w integral with which is a rack 0 that is in mesh with and drives a pinion g/ fast upon the indicator shaft .2. The latter extends from end to end of the autorobile and is journaled in the hangers 2 fastened to the chassis j at their upper ends. The rack :n is formed with ribs 3 which fit in guideways al in a plate o which is carried by and really forms a partI ot the casing la.

To the vrear end of the automobile is vfastened a suitably-inscribed dial-plate 6 through the center of which projects the rear end of the indicator-shaft carrying the in dexhand 7 that travelsl over the face of the dialplate 6 and indicates in conjunction therewith the. speed of the vvehicle. To the front end oi. the indicatorshaft .a is fastened a bevel-gear S which through the bevel-gear 9 drives the vertical shaft l0 that in turn through the gears 1l, 1*?. rotates the balls s causes an upward movement of the ring u and, through thelatter, of the loose collar w and the rack m. Movement of the latter causes, through the pinion y, rotation of the indicator-shaft z and of its connected index-hands 7 over the dials 6 and 6*.

A policeman or any other observer is by means of my new indicating apparatus enabled to discover the speed of the road vehicle provided with the apparatus.

I claim:

In a sel-propelled vehicle, the combination of a vehiclebody; a driving mechanism for propelling the same; an indicator-shalt which extends from end to end of and is carried by said vehicle-body; a governor mechanism which '1s driven by said driving indicatonshaft in response to the movements mechanism and which drives said indicatorof said governor mechanisinan( said dials 10 shaft; a pail' of dials one of which is mountbeing mounted in plain View from outside of ed at the 'front 0f said vehic1ebody and 'the said vehicle-body.

.; other of which is mounted at the rear of the JQHN E VVLKE.

same; anda pair of index hands, one for Witnesses: ouch of said dials; said mdex hands being G. VVELLNER, moved over sind dials by the turning of said HERMAN Konin; 

